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We present a novel way to generate waves bearing Orbital Angular Momentum (OAM) in a circular waveguide by using two monopole antennas. The OAM mode ℓ = 1 is generated by a combination of the classical TM01 and TE21 modes of the circular waveguide. Two printed monopole antennas are used to create these two modes. The design procedure of this novel “OAM antenna” is presented. The resulting electrical...
We present a novel horn antenna to generate radio waves bearing Orbital Angular Momentum (OAM) by using a circular waveguide. The OAM mode ℓ = 1 is generated by using a spiral phase plate (SPP) inside a circular waveguide. We present here two methods to transform the classical guided modes to OAM wave. The resulting electrical field distribution and the radiation patterns evidence the properties of...
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